Carbureter.



A. F. HOWELL.

CARBURETER.

ArPucAHoNr1LEDsLP1-29. 1914.

lzltontedug. 24, 1915.

ARTHUR F. RWELL, F SPRINGFELD, MASSACHUSETTS.

CRBURETER.

Specification of `Letters Patent.

lFeitented fitug, 2st, 1h15.

To all whom it may concern.:

lie it known that l, ARTHUR l?. Rownnn, a subject of the King of Great Britain, residing at Springfield, in the county oi' Hampden and State oi Massachusetts, have invented certain new and useful improveinentsin Carbureters; and l do hereby declare the following 'to be a full, clear, and exact description oi? the invention, such as wid enable others skilled in the art to which it apperteins to rnalie and use the saine.

rlliis invention relates to carbureters and the primary object of the invention is the provision of a carburetor which is constructed for utilizing a minimum amount of petrol or ga-solene, and one which will properly vaporize the volatile fuel used at all speeds.

Another object of this invention is the provision of a carbureter which embodies a throttle and a jet disposed in alinement with each other, about which' throttle and jet are positioned slidably movable choke sleeves for varying the area about the jet and the throttle for increasing or decreasing the pass-age oit air and gas into and through the cerbureter.

Another object of this, invention 1s the vprovision of a carbureter which has a plu- 'relity of air openings formed in the casmg thereof, which forms an air brake whenl running down' a long incline with the throttle closed and also taires in a quantity of pure air, cleaning and cooling the engine cylinder, relieving or .breaking the vacuum there-- i in and by so doing stops or prevents oil from being sucked above the piston while `through the sides ol' the head 21 of the. jet

traveling down a long incline, which prevents excess carbonization.

With the foregoing and other objects in View this invention consists in such novel features of construction, combination and arrangement otparts as will be hereinafter more fully described, illustrated in the accompanying drawings and claimed.

ln describing the invention in detail reierence will be had to the accompanying drawings'wherein like characters designate like or corresponding parts throughout the several views, and in which:

Figure 1 is a central sectional view through the improved carburetor, and Fig. 2 is a fragmentary view in side elevation of the carburetor.

Refer .g more particularly to the drawings, 1 ci signates the outer casing of the carburetor which has transversiiy extending projections 2 and 3 formed thereupon. The transversely extending projection 3 is provided with an opening et formed therein which receives the float 5 ci the carbureter. The iioat 5 is mounted about a valve stern 6, which valve stern has a substantially truste-conical shaped valve 7 mounted upon the lower end thereof, which controls the inlet of gasolene into the chamber 1, through the opening 8 j21nd the bores 9, which openings are formed in the extension 10 formed' upon the projection 3 and in the pipe 11 which is connected to the projection 3 by means or a collar 12.

The casing 1 or the carbureter has an opening or passage way 14 formed therein and extending transversely through the same adjacent the bottom thereof, which opening has af set screw inserted therein for forming a closure for the same. An inclined passage way 16 communicates with the passage way 1d ,and with the interior ci' the projection 3, for permitting gasolene or other suitable volatile liquids to pass from the chamber l into and through the passages 16 and 14 for forcing upwardly through the jet tube 17. rlhe jet tube 17 is mounted interiorly of the casing 1 and has its ends screw -threadably mounted in an opening 18, which has communication with the passage way .1-1. rlhe jet tube 17 is provided with a vertical bore 19 which terminates inwardly of the upper end of the tube and has communication with the plurality of transversely extending openings or passage ways 20, which extend outwardly tube 17. The vertical bore 19 has a needle valve Q2 positioned therein, which is controlled by the adjustability of a rod 23 for controlling the amount or quantity of volatile fuel which passes through the bore 19.

rl'he casing 1 has an elbow joint 25 secured to the upper end thereof, which forms a gas outlet for the carburetor and has communication with combustion chambers of an internal coiiibustion engine (not shown).

The elbow 25 is secured to the upper end oft the casing 1 in any suitable manner, such as by transversely extending ears 2G and bolts Q7 which through the ears and are held therein for holding the ears in binding engagement with each other by nuts 28.

The elbow 25 hns an enlarged throttle stein supporting guideway 29 fol-ined integrally therewith, in which guideway is the constricted portion so adjustably seated the throttle stem 30. The throttle stem 3() is provided with external screw threads which coact with internal screw threads formed upon the guideway 29, whereby the insertion of the throttle cone 3l which is secured to theinner depending end of the'throttle stem 30 may be regulated.

rlhe casing 1 has mounted therein a throttle choke sleeve 2. which has an interiorly extending enlargement 3? formed upon its upper end as is clearly shown in Fig. l of the drawings. The throttle choke .sleeve 32 has detachably secured to its lower end a jet choke sleeve l. which is positimied about the jet tube 17 for regulating the passage of air through the opening formed in the transverse projection 2 into the carlnlreting chamber of the carburcter. which carbureting chamber is formed within the sleeves 32 and 33. The sleeve :l1-1 projects downwardly across the conmiunicating openings between theiinterior of the casing l and .the transverse projection 2, regulating the magnitude of this opening and consequently the infiow or ingress of air into the lower most portion ot' the sleeve CS2-3 wardly about the jcb tube 1T. The sleeve 323 has its bores constricted adjacent the upper end thereof, as is clearly shown in drawings, and the walls of the sleeves taper outwardly or diverge as they extend downwardly from that the opening or area between the outer surface of the head of the jet and the inner Surface or wall of the sleeve will beincreased upon the upward movement of the sleeve within the casing 1.

The sleeve 32 has a bolt 34 secured thereto, which extends out of the casing l through a slot and has connected thereto an angled lever 36, which is pivotally mounted upon an extension 37. The angled lever 36 has a plurality of longitiidinall)Y spaced openings 3S .formed thereinwhich are connected to any suitable type of controlling rod or lever (not shown), by means of which the elevation of the sleeves and 33 within the easing 31 may be, varied to suit various conditions and for the regulation of the speed of generation of gases within the earburcter.

rlhe easing 1 is provided with a plurality of circuniferentially spaced openings 31) formed therein, lwhich openings are lpositioned above the vupper end of the sleeve 32, when the sleeve is in its downward position. The openings 3f) are provided for the inlet ofair, for forming a fairly good brake when runningl down long inclines with the throttle closed and also to permit of the scavaging of the combustion chan'lbes of the (not shown) to which the carburcter is connected, for the prevention of the carbonization of oil within the cylinders above the piston and also for relieving the vacuum therein.

for passage up` ythrottle cone. 31

engine In the operation of the improved carbureter heretofore described Ithe volatile liquid enters the vertical bore-19 of the jet tube 1T through the opening or passagev ways 1G and 11 and 1S, and the amount flowing therethrough is regulated b v the adjustment of the needle valve 19. The volatile liquid passingupwardly through the bore 19 iS deflected from the jet tube into the interior of the sleeve Iii-3 through the transversely extending passage ways 20. l'pon the egressing of the volatile fuel or liquid from the passage ways 2t). it is vaporized through confusing contactsl with air which passes inwardly into the sleeve 3? through the opening' 40. which is left beneath the lower end of the sleeve il? and the inner wall of the extension 2. The air entering the sleeve 33 through the opening Jf() passes upwardly about the jet tube 1i' and comes in Contact with-thc volatile fuel passing out of the passage ways Q0.. The the volatile fuel vaporizes the same and the combined air and fuel which form an impregnated combustible gas passes upwardly through the sleeve 32 and therefrom by passing about the throttle cone 231 and upwardly through the elbow 25 to the coinbustion chambers of an engine.

The throttle lever 36, which is connected to the sleeve 3Q is operated or moved enough for moving the sleeve 3Q upwardly for closmg the' openings 39, and moving the inward-v ly extending enlarged portion 33' of` the sleeve out of engagement with the surface of the cone 31 for permitting of the passage of the impregnated air upwardly through the sa me. By moving the sleeve 32 upwardly the jet choke sleeve is also moved upwardly for increasing the area about the jet. The throttle cone 31 is adjusted sothat the area or space about the circumference of the same, interiorly of the sleeve 32 is greater than thespace about the head 21y of the jet tube 17. The further actuation of the lever 3G will increase the space or area about the jet tube 17, as is to the drawing. By the construction of the sleeves 32 and 3 3 so that the space about the throttle cone is of greater area than the space about the head 21 of the jet tube 17. the air velocity is' greatest at the jet which permits of a more proficient vaporization ofthe volatile liquid.

-From the foregoing description taken in connection with the accompanying draw..

ings the advantages of the construction and' of the method of operation of the improved carbureter will be readil'Y apparent to those skilled in the art to which this invention appertains and. while in the' foregoing description, the principle of the operation of this invention has been described together with various 'l'eaturefsmf construction7 it is to be and about the head of the. clearly shown by reference air contacting with understood that certain minor features of construction, combination and arrangement of parts may be altered to suit practical conditions provided such alterations arc comprehended within the scope of what is claimed.

Nhat is claimed is:

1. ln a carbureter, an outer casing, a throttle cone adjustably positioned within said casing, a jet tube extending within said casing, and a pair of sleeves positioned within said casing and about said throttle cone and jet tube for regulating the flow of air into and the flow of gas out of said casing.

2. In a` carbureter, an outer casing having a throttle cone adjustably positioned therein, a jet tube extending upwardly within said casing, a throttle choke sleeve positioned within said casing about said throttle cone, a jet choke sleeve positioned within said casing about said jet tube, and means for moving said jet choke sleeve and said throttle choke sleeve vertically within said casing synchronously with each other for regulating the iniiow of air into and the outflow of gases out of said casing.

3. In' a carbureter, a casing, a throttle cone adjustably suspended within said casing, a jet tube extending upwardly Within said casing, a volatile fuel containing chamber communicant with said jet tube, a needle valve for controlling the passage of volatile fuel through said jet tube, a throttle choke sleeve adjustably mounted Within said cas-y ing, a jet choke sleeve adjustably mounted in said casing and connected to said throttle choke sleeve for movement synchronously therewith, said throttle choke sleeve and said jet sleeve having constricted portions, the side walls of said jet choke sleeve and said throttle choke sleeve diverging from said constricted portions whereby the area about saidsjet and said throttle cone will be increased upon the upward movement of said sleeve within said casing, said jet choke sleeve controlling the inlet of air thereinto.

In testimony whereof I aliix my signature in presence of two witnesses.

ARTHUR F. RUWELL.

Witnesses;

ERNEST W. CARMAN, M. E. BAINES. 

